ContainerTools

0.0.1

netcore1.0/RunspaceDelegateFactory.cs

                                using System;

using System.Collections.Generic;

using System.Linq;

using System.Linq.Expressions;

using System.Management.Automation.Runspaces;

public class RunspacedDelegateFactory

{

    public static Delegate NewRunspacedDelegate(Delegate _delegate, Runspace runspace)

    {

        Action setRunspace = () => Runspace.DefaultRunspace = runspace;

        return ConcatActionToDelegate(setRunspace, _delegate);

    }

    private static Expression ExpressionInvoke(Delegate _delegate, params Expression[] arguments)

    {

        var invokeMethod = _delegate.GetType().GetMethod("Invoke");

        return Expression.Call(Expression.Constant(_delegate), invokeMethod, arguments);

    }

    public static Delegate ConcatActionToDelegate(Action a, Delegate d)

    {

        var parameters =

            d.GetType().GetMethod("Invoke").GetParameters()

            .Select(p => Expression.Parameter(p.ParameterType, p.Name))

            .ToArray();

        Expression body = Expression.Block(ExpressionInvoke(a), ExpressionInvoke(d, parameters));

        var lambda = Expression.Lambda(d.GetType(), body, parameters);

        var compiled = lambda.Compile();

        return compiled;

    }

}